High pressure housing assembly, electric compressor, air conditioning system and vehicle

Abstract

The application discloses a high-pressure shell assembly, an electric compressor, an air conditioning system and a vehicle. The high-pressure shell assembly comprises a high-pressure shell, a high-pressure cavity and a refrigerant discharge channel are formed on the high-pressure shell, a compression component of the electric compressor is adapted to discharge compressed refrigerant to the high-pressure cavity, and the refrigerant discharge channel is used for discharging refrigerant outside the high-pressure shell. A resonance cavity and an oil separation cavity are also formed on the high-pressure shell and are distributed at intervals. An oil separation inlet in the oil separation cavity is communicated with the high-pressure cavity, an oil separation outlet in the oil separation cavity is located on an inner wall of the refrigerant discharge channel, and the resonance cavity is communicated with the refrigerant discharge channel. The high-pressure shell assembly for the electric compressor in the application is beneficial to improving the airflow noise and pulsation on the exhaust side of the electric compressor, and then improving the noise and pulsation of the refrigerant discharged by the electric compressor, and relieving or eliminating the resonance problem of each component in the vehicle thermal management system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a high-pressure shell assembly, an electric compressor, an air conditioning system and a vehicle. BACKGROUND

[0002] The electric compressor is a core component of the refrigeration equipment for vehicles. The electric compressor works to generate vibration noise, which affects the noise of the vehicle and causes subjective hearing problems. In the related art, the high-pressure refrigerant discharged by the compression component of the electric compressor enters the high-pressure cavity and then directly leaves the compressor through the refrigerant discharge channel. Along with the exhaust gas flow noise and pressure pulsation generated when the electric compressor operates, the resonance of each component in the thermal management system on the vehicle is easily excited, which causes the noise and vibration problems of the vehicle. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a high-pressure shell assembly that can improve the exhaust noise and pressure pulsation of an electric compressor.

[0004] The present application also provides an electric compressor having the above high-pressure shell assembly.

[0005] The present application also provides an air conditioning system having the above electric compressor.

[0006] The present application also provides a vehicle having the above air conditioning system.

[0007] The high-pressure shell assembly for an electric compressor according to an embodiment of the present application comprises: a high-pressure shell, a high-pressure cavity and a refrigerant discharge channel being formed on the high-pressure shell, a compression component of the electric compressor being adapted to discharge compressed refrigerant into the high-pressure cavity, the refrigerant discharge channel being used to discharge the refrigerant outside the high-pressure shell; a resonance cavity and an oil separation cavity being further formed on the high-pressure shell and being distributed at intervals, an oil separation inlet in the oil separation cavity being in communication with the high-pressure cavity, an oil separation outlet in the oil separation cavity being located on the inner wall of the refrigerant discharge channel, the resonance cavity being in communication with the refrigerant discharge channel.

[0008] According to the high-pressure shell assembly for the electric compressor in the embodiment of the present application, by arranging the resonance cavity on the high-pressure shell, a cavity structure satisfying the Helmholtz resonance principle can be formed, and the resonance cavity is communicated with the refrigerant discharge channel communicated with the oil separation cavity, so that the resonance cavity can not only eliminate the noise generated by the refrigerant acting on the high-pressure shell, but also eliminate the noise and pressure pulsation accompanied by the gaseous refrigerant entering the refrigerant discharge channel, thereby improving the airflow noise and pulsation of the electric compressor discharge side, further improving the noise and pulsation of the refrigerant discharged by the electric compressor, reducing or eliminating the resonance problem of each component in the vehicle thermal management system, and improving the safety of the electric compressor.

[0009] In some embodiments, the resonance cavity is communicated with the refrigerant discharge channel through a connecting channel, and a cross-sectional area of the connecting channel is smaller than a cross-sectional area of the resonance cavity.

[0010] In some embodiments, the high-pressure shell further comprises a sound-absorbing insert pipe, one end of the sound-absorbing insert pipe is connected to an inner wall of the connecting channel, and the other end of the sound-absorbing insert pipe extends into and opens towards the resonance cavity.

[0011] In some embodiments, a length direction of the sound-absorbing insert pipe is parallel to a length direction of the resonance cavity, and an extending length of the sound-absorbing insert pipe in the resonance cavity is less than 2 / 3 of an extending length of the resonance cavity.

[0012] In some embodiments, the sound-absorbing insert pipe is provided with at least one sound-absorbing hole.

[0013] In some embodiments, the resonance cavity is provided with a first oil return channel, the first oil return channel is located in a lower space in a gravity direction in the resonance cavity, and the first oil return channel is used to flow the separated lubricating oil to the compression component.

[0014] In some embodiments, a setting position of the first oil return channel in the resonance cavity satisfies: h≤0.3H; wherein h is a vertical distance between a highest point of the first oil return channel and a lowest point of the resonance cavity in the gravity direction, and H is a vertical distance between the highest point and the lowest point of the resonance cavity in the gravity direction.

[0015] In some embodiments, a bottom wall of the refrigerant discharge channel is provided with the oil separation outlet and a first inlet hole arranged at intervals from the oil separation outlet, and the first inlet hole is communicated with the resonance cavity.

[0016] In some embodiments, the first inlet hole and the oil separation outlet are located on both sides of a central axis of the refrigerant discharge channel.

[0017] In some embodiments, a first opening is formed on a surface of the high-pressure shell for machining the resonance cavity, and the high-pressure shell comprises a first end cover covering the first opening.

[0018] In some embodiments, a second opening is formed on a surface of the high-pressure shell for machining the oil separation cavity, and the high-pressure shell comprises a second end cover covering the second opening; the first opening is located at the bottom of the resonance cavity in the direction of gravity, and the second opening is located at the bottom of the oil separation cavity in the direction of gravity.

[0019] In some embodiments, a first machining end face is formed on the outside of the high-pressure shell, and the first opening is open at the first machining end face; the first end cover comprises a pressing portion and a connecting portion, the outer diameter of the pressing portion is larger than the outer diameter of the connecting portion to form a limiting surface at the position connected with the connecting portion; the connecting portion extends into the first opening and is fixedly connected with the inner peripheral wall of the first opening, and the pressing portion is located outside the first opening and the limiting surface is pressed against the first machining end face.

[0020] In some embodiments, the central axis of the resonance cavity and the central axis of the oil separation cavity have an included angle.

[0021] In some embodiments, an oil separation device is arranged in the oil separation cavity for oil-gas separation, and the refrigerant entering the oil separation cavity is discharged from the oil separation outlet after oil-gas separation by the oil separation device.

[0022] In some embodiments, the oil separation device is configured as a hollow tubular structure, the axial direction of the oil separation device is parallel to the length direction of the oil separation cavity, and the oil separation inlet is located outside the peripheral wall of the oil separation device.

[0023] According to the second aspect of the present application, an electric compressor comprises: a shell component, the shell component comprising a high-pressure shell assembly for an electric compressor according to the first aspect of the present application; a compression component, an exhaust port of the compression component being in communication with the high-pressure cavity to discharge compressed refrigerant into the high-pressure cavity; and a motor component, the motor component comprising a motor body and a drive shaft, the motor body driving the compression component to perform compression work through the drive shaft.

[0024] In some embodiments, the shell component further comprises: a middle partition plate, the compression component and the motor body being arranged on two sides of the middle partition plate, and the drive shaft being arranged through the middle partition plate to be connected with the compression component; and a low-pressure shell, a low-pressure cavity accommodating the motor body being formed between the middle partition plate and the low-pressure shell, and a refrigerant suction inlet being formed on the low-pressure shell and being in communication with the low-pressure cavity, the compression component sucking refrigerant from the low-pressure cavity.

[0025] According to the air conditioning system of the third aspect of the embodiment of the present application, the electric compressor is according to the second aspect of the embodiment of the present application.

[0026] According to the vehicle of the fourth aspect of the embodiment of the present application, the air conditioning system is according to the third aspect of the embodiment of the present application.

[0027] The vehicle, the air conditioning system, the electric compressor and the high-pressure shell assembly for electric compressor have the same advantages as the prior art, which will not be repeated here.

[0028] Additional aspects and advantages of the present application will be in part apparent and in part pointed out below in the description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the description of the embodiments, given below with reference to the following drawings:

[0030] Figure 1 is a structural schematic diagram of the electric compressor according to the embodiment of the present application;

[0031] Figure 2 is a structural schematic diagram of the high-pressure shell in the embodiment one according to the present application in A-A; Figure 1

[0032] Figure 3 is a structural schematic diagram of the high-pressure shell in the embodiment two according to the present application in A-A; Figure 1

[0033] Figure 4 is a structural schematic diagram of the high-pressure shell in the embodiment three according to the present application in A-A; Figure 1

[0034] Figure 5 is a structural schematic diagram of the high-pressure shell in the embodiment four according to the present application in A-A; Figure 1

[0035] Figure 6 is a structural schematic diagram of the vehicle according to the embodiment of the present application.

[0036] Reference Signs:

[0037] Electric compressor 100;

[0038] High-pressure shell 1;

[0039] High-pressure cavity 11; refrigerant discharge passage 12; exhaust outlet 121; ​​​​

[0040] resonance cavity 13; first opening 131; first oil return passage 132;

[0041] connecting passage 14; first inlet hole 141;

[0042] oil separation cavity 15; oil separation inlet 151, oil separation outlet 152; second oil return passage 153; second opening 154;

[0043] first end cover 21; pressing portion 211; connecting portion 212; second end cover 22;

[0044] oil separation member 3; sound attenuation insert 4;

[0045] low-pressure shell 102; refrigerant suction inlet 1021; middle partition plate 103; cover plate 104; low-pressure cavity 105;

[0046] compression component 20; exhaust port 201;

[0047] motor component 30; motor body 301; drive shaft 302;

[0048] electronic control component 40;

[0049] vehicle body 200; air conditioning system 300; vehicle 1000. DETAILED DESCRIPTION

[0050] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein like or similar elements are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below are exemplary only, and are not to be construed as limiting the present application.

[0051] Reference is made below to Figures 1-6 A high-pressure shell assembly for an electric compressor is described below according to an embodiment of the present application, which can greatly improve the exhaust noise and pressure pulsation of the electric compressor 100 by providing a resonance cavity 13 and an oil separation cavity 15, and improve the user experience.

[0052] As shown in Figures 2-5 The high-pressure shell assembly includes a high-pressure shell 1, which is formed with a high-pressure cavity 11 and a refrigerant discharge passage 12. The compression component 20 of the electric compressor 100 is adapted to discharge the compressed refrigerant into the high-pressure cavity 11, and the high-pressure cavity 11 is adapted to discharge the refrigerant outside the high-pressure shell 1 through the refrigerant discharge passage 12. Thus, when the electric compressor 100 is powered on and operates normally, low-pressure refrigerant can be sucked in and compressed by the compression component 20 to form high-pressure refrigerant, which is discharged into the high-pressure cavity 11 through the exhaust port 201 of the compression component 20, and finally discharged outside the high-pressure shell 1 through the refrigerant discharge passage 12.

[0053] The high-pressure shell 1 is further provided with a resonant cavity 13 and an oil separation cavity 15 distributed at intervals, the oil separation inlet 151 in the oil separation cavity 15 is communicated with the high-pressure cavity 11, the oil separation outlet 152 in the oil separation cavity 15 is located on the inner wall of the refrigerant discharge channel 12, and the resonant cavity 13 is communicated with the refrigerant discharge channel 12.

[0054] That is to say, after the refrigerant compressed by the compression component 20 enters the high-pressure cavity 11, it can enter the oil separation cavity 15 from the oil separation inlet 151, the high-pressure refrigerant can realize oil-gas separation after entering the oil separation cavity 15, and then the gaseous refrigerant at the separation position is discharged through the refrigerant discharge channel 12. The refrigerant discharge channel 12 is arranged at the upper position of the high-pressure shell 1, and the upper end of the refrigerant discharge channel 12 is open to form an exhaust outlet 121. In actual design, the resonant cavity 13 can be communicated with the inner bottom wall and / or inner side wall of the refrigerant discharge channel 12, and the oil separation outlet 152 can also be formed on the inner bottom wall and / or inner side wall of the refrigerant discharge channel 12.

[0055] It should be noted that the electric compressor 100 can be the core component of the refrigeration equipment for the vehicle 1000, and the electric compressor 100 works to generate vibration noise, which affects the noise of the vehicle 1000 and causes subjective listening problems. In the related art, the high-pressure refrigerant discharged by the compression component 20 of the electric compressor 100 enters the high-pressure cavity 11 and then directly leaves the compressor through the refrigerant discharge channel 12. Along with the exhaust gas flow noise and pressure pulsation generated when the electric compressor 100 operates, it is easy to excite the resonance of each component in the thermal management system of the vehicle 1000, causing noise and vibration problems of the vehicle 1000. In the present application, one end of the resonant cavity 13 is communicated with the refrigerant discharge channel 12, and the other end is in a closed state, so that the resonant cavity 13 forms a cavity structure that satisfies the principle of Helmholtz resonance in the high-pressure shell assembly of the electric compressor. The resonant cavity 13 is communicated with the refrigerant discharge channel 12, and the noise and pressure pulsation in the refrigerant discharge channel 12 can diffuse into the resonant cavity 13, so as to be weakened or eliminated under the action of the inner wall of the resonant cavity 13, thereby realizing the effect of silencing and noise reduction. That is to say, when the electric compressor 100 operates, the gaseous refrigerant separated in the oil separation cavity 15 flows to the refrigerant discharge channel 12 through the oil separation outlet 152 and flows out from the exhaust outlet 121, and at the same time, the exhaust gas noise and pressure pulsation in the gaseous refrigerant can enter the resonant cavity 13 from the inner bottom wall or inner side wall of the refrigerant discharge channel 12, thereby realizing the effect of exhaust noise reduction.

[0056] The oil separation cavity 15 and the resonance cavity 13 are spaced apart on the high-pressure shell 1, that is, the oil separation cavity 15 and the resonance cavity 13 are not directly communicated in actual structural design, so that the oil separation cavity 15 and the resonance cavity 13 are respectively formed separately, that is, the machining between the oil separation cavity 15 and the resonance cavity 13 does not interfere in the machining process, avoiding machining conflicts. For example, when the oil separation cavity 15 and the resonance cavity 13 are both punched and formed, the punching tool of the oil separation cavity 15 and the punching tool of the resonance cavity 13 can rotate at the same time, and the problem of interference and collision of the two machining tools does not occur; or when the oil separation cavity 15 and the resonance cavity 13 are both cast and formed, the oil separation cavity 15 and the resonance cavity 13 do not interfere with each other in the process of being put into the mold and taken out of the mold, improving the machining efficiency and the yield.

[0057] It should be noted that the Helmholtz resonance principle is well known to those skilled in the art. Based on the fact that the resonance cavity 13 and the oil separation cavity 15 are formed on the high-pressure shell 1, those skilled in the art can match and calculate the specific sizes of the resonance cavity 13 and the oil separation cavity 15 according to the specific requirements of different working conditions, so the specific sizes are not limited in the present application. In addition, in the present application, the resonance cavity 13 is formed on the high-pressure shell 1, without the need to add a sound attenuation accessory with a sound attenuation hole and a sound attenuation cavity on the high-pressure shell 1, thereby saving the investment cost of the sound attenuation accessory, eliminating the installation process of assembling the sound attenuation accessory on the high-pressure shell 1, improving the production efficiency, and avoiding the adverse effects of unstable installation and vibration of the sound attenuation accessory on the sound attenuation effect.

[0058] According to the high-pressure shell assembly for the electric compressor in the embodiment of the present application, by arranging the resonance cavity 13 on the high-pressure shell 1, a cavity structure satisfying the Helmholtz resonance principle can be formed, and the resonance cavity 13 is communicated with the refrigerant discharge channel 12 communicated with the oil separation cavity 15, so that the resonance cavity 13 can not only eliminate the noise generated by the refrigerant acting on the high-pressure shell 1, but also eliminate the noise and pressure pulsation accompanied by the gaseous refrigerant entering the refrigerant discharge channel 12, thereby improving the airflow noise and pulsation of the electric compressor 100 on the exhaust side, further improving the noise and pulsation of the refrigerant discharged by the electric compressor 100, reducing or eliminating the resonance problem of each component in the vehicle 1000 thermal management system, and improving the safety of the electric compressor 100.

[0059] In some embodiments, the resonance cavity 13 is communicated with the refrigerant discharge channel 12 through the connecting channel 14, and the cross-sectional area of the connecting channel 14 is smaller than that of the resonance cavity 13. That is, the medium in the resonance cavity 13, such as gaseous refrigerant, can flow to the refrigerant discharge channel 12 through the connecting channel 14. Figures 2-5As shown, the connecting passage 14 is arranged at the upper region of the high-pressure shell 1, and the upper end of the resonance cavity 13 is communicated with the connecting passage 14, so that the gaseous refrigerant in the resonance cavity 13 can enter the connecting passage 14 upwardly and flow out from the refrigerant discharge passage 12. It can be understood that, in the present application, the flow area of the connecting passage 14 is arranged to be smaller than the flow area of the resonance cavity 13, so that the first end of the resonance cavity 13, i.e. the lower end in Figure 2 , is formed as one inner end face of the resonance cavity 13, and the second end of the resonance cavity 13, i.e. the upper end in Figure 2 , forms a stepped face at the connection with the connecting passage 14, which can be used as another inner end face of the resonance cavity 13.

[0060] Thus, the resonance cavity 13 forms a cavity structure satisfying the Helmholtz resonance principle with one end closed and one end semi-closed, so as to improve the airflow noise and pulsation at the discharge side of the electric compressor 100, and further improve the noise and pulsation of the refrigerant discharged from the electric compressor 100.

[0061] In some embodiments, the high-pressure shell 1 is further provided with a sound-absorbing insert pipe 4, one end of the sound-absorbing insert pipe 4 is connected to the inner wall of the connecting passage 14, and the other end of the sound-absorbing insert pipe 4 extends into and opens into the resonance cavity 13. As shown in Figure 4 and Figure 5 , the resonance cavity 13 is formed at the lower left side of the high-pressure shell 1 and extends obliquely from the lower left to the upper right. The sound-absorbing insert pipe 4 is installed in the resonance cavity 13, and the upper end of the sound-absorbing insert pipe 4 is fixedly connected to the inner wall of the connecting passage 14, such as by interference fit or threaded connection, and can also be connected by welding fixation, and the lower end of the sound-absorbing insert pipe 4 is suspended in the resonance cavity 13, so that the sound-absorbing insert pipe 4 is relatively fixed with the high-pressure shell 1.

[0062] The upper end of the sound-absorbing insert pipe 4 opens into the connecting passage 14 to communicate with the connecting passage 14, and the lower end of the sound-absorbing insert pipe 4 opens into the resonance cavity 13. That is, the resonance cavity 13 is communicated with the connecting passage 14 and the refrigerant discharge passage 12 through the lumen of the sound-absorbing insert pipe 4, so that the vibration noise and pressure pulsation in the gaseous refrigerant after entering the refrigerant discharge passage 12 can first enter the connecting passage 14, and a small part of the noise and pressure pulsation can be weakened or eliminated by the reflection of the inner wall of the connecting passage 14, and further, most of the noise and pressure pulsation enters the lumen of the sound-absorbing insert pipe 4, and a part of the noise and pressure pulsation entering the lumen is weakened or eliminated by the reflection of the inner wall of the lumen, and the remaining most of the noise and pressure pulsation continues to enter the space between the resonance cavity 13 and the sound-absorbing insert pipe 4, so that multi-space sound-absorbing treatment can be achieved.

[0063] Thus, by fixing one end of the sound-damping tube 4 in the connecting channel 14 and extending the other end of the sound-damping tube 4 into the resonance cavity 13 to communicate with the resonance cavity 13, multiple sound-damping spaces are formed in the high-pressure shell 1, thereby greatly improving the sound-damping effect in the high-pressure shell 1.

[0064] In some embodiments, the length direction of the sound-damping tube 4 is parallel to the length direction of the resonance cavity 13, as shown in FIG. 1, the sound-damping tube 4 is configured as a circular tube, and the resonance cavity 13 is configured as a circular cavity, and the axis of the sound-damping tube 4 coincides with the axis of the resonance cavity 13, i.e., the sound-damping tube 4 is centrally installed in the resonance cavity 13. Figure 4 and Figure 5 In some embodiments, the length direction of the sound-damping tube 4 is parallel to the length direction of the resonance cavity 13, as shown in FIG. 1, the sound-damping tube 4 is configured as a circular tube, and the resonance cavity 13 is configured as a circular cavity, and the axis of the sound-damping tube 4 coincides with the axis of the resonance cavity 13, i.e., the sound-damping tube 4 is centrally installed in the resonance cavity 13.

[0065] The length of the sound-damping tube 4 extending into the resonance cavity 13 is less than 2 / 3 of the extension length of the resonance cavity 13, such as 1 / 2 or 1 / 3 of the extension length of the resonance cavity 13. That is, in the present application, the extension length of the sound-damping tube 4 is significantly less than the extension length of the resonance cavity 13. In this way, by providing the sound-damping tube 4, three spaces are defined in the resonance cavity 13, one being the internal space of the tube cavity of the sound-damping tube 4, the second being the space between the lower end of the sound-damping tube 4 and the lower end surface in the resonance cavity 13, and the third being the space between the outer peripheral wall of the sound-damping tube 4 and the inner peripheral wall of the upper end portion of the resonance cavity 13.

[0066] In other words, by providing the sound-damping tube 4 with a length less than that of the resonance cavity 13, three types of sound-damping cavities are formed in the resonance cavity 13, thereby producing three different types of sound-damping effects, enriching the sound-damping mode in the resonance cavity 13, and achieving better sound-damping effects than a single sound-damping chamber structure.

[0067] In some embodiments, the sound-damping tube 4 is provided with at least one sound-damping hole, i.e., one sound-damping hole can be provided on the sound-damping tube 4, or two, three or more sound-damping holes can be provided. The sound-damping hole can directly communicate the tube cavity of the sound-damping tube 4 with the space in the resonance cavity 13, i.e., the sound-damping tube cavity can not only communicate with the resonance cavity 13 through the opening at its end, such as the lower end, but also communicate with the resonance cavity 13 through the sound-damping hole on its peripheral wall, which is conducive to improving the transmission efficiency of the vibration noise and pressure pulsation between the tube cavity and the resonance cavity 13, and improving the sound-damping effect.

[0068] As in the actual design, a plurality of sound attenuation holes can be arranged in the axial direction of the sound attenuation tube 4, that is, the outer peripheral wall of the sound attenuation tube 4 is provided with a plurality of sound attenuation holes, and the plurality of sound attenuation holes are distributed in the axial direction of the sound attenuation tube 4. To increase the flow cross section between the lumen of the sound attenuation tube 4 and the flow passage, and ensure the flow efficiency of the gaseous refrigerant. Among them, in the actual design, the plurality of sound attenuation holes can be uniformly spaced in the axial direction of the sound attenuation tube 4 to ensure the uniformity of the gas flow at each position of the sound attenuation tube 4, and the sound attenuation effect at each position of the sound attenuation tube 4 is more balanced.

[0069] Each sound attenuation hole includes a plurality of sound attenuation holes, and the plurality of sound attenuation holes of each sound attenuation hole are arranged in the circumferential direction of the sound attenuation tube 4. Thus, the airflow can flow at different positions in the axial and circumferential directions of the sound attenuation tube 4, and by arranging a large number of sound attenuation holes in the axial and circumferential directions of the sound attenuation tube 4, the flow of gaseous refrigerant from the flow passage into the sound attenuation tube 4 is increased, and rapid exhaust is achieved.

[0070] In some embodiments, the bottom space in the resonant cavity 13 in the direction of gravity is provided with a first oil return channel 132, as shown in Figure 5 The first oil return channel 132 is arranged at the lower end of the resonant cavity 13, that is, the inlet end of the first oil return channel 132 is arranged at the inner peripheral wall of the resonant cavity 13 and opens towards the inside of the resonant cavity 13, so that the oil deposited in the resonant cavity 13 can flow out through the first oil return channel 132 and return to the space where the compression component 20 is located.

[0071] The first oil return channel 132 extends in the direction close to the compression component 20 at the bottom space of the resonant cavity 13, and the axis of the first oil return channel 132 forms an angle with the axis of the resonant cavity 13, and the first oil return channel 132 extends away from the resonant cavity 13 and is inclined downward relative to the resonant cavity 13. It can be understood that the resonant cavity 13 is also configured to be open at the lower end to form the first opening 131, so that the first oil return channel 132 and the resonant cavity 13 can be machined from the same side of the high-pressure shell 1, such as the first oil return channel 132 and the resonant cavity 13 can be machined from different positions on the lower side of the high-pressure shell 1., thereby reducing the machining difficulty.

[0072] In actual design, the first oil return channel 132 is lower than the oil separation outlet 152, that is, in the design in which the oil separation outlet 152 is arranged on the inner circumferential wall of the connecting channel 14 or in the design in which the oil separation outlet 152 is arranged on the inner circumferential wall of the resonance cavity 13, the oil separation outlet 152 is higher than the first oil return channel 132. In this way, the oil liquid entering the resonance cavity 13 at the oil separation outlet 152 can be effectively returned to the space in which the compression component 20 is located from the first oil return channel 132 after being deposited in the resonance cavity 13. The inlet end of the first oil return channel 132 is spaced apart from the lower end surface of the resonance cavity 13 by a certain distance, so that the first end cover 21 is spaced apart from the first oil return channel 132 after being mounted on the first opening 131 to avoid the first end cover 21 being installed too deeply to block the first oil return channel 132.

[0073] In some embodiments, the position of the first oil return channel 132 in the resonance cavity 13 satisfies h≤0.3H; wherein, as shown in FIG. 1, h is the vertical distance between the highest point of the first oil return channel 132 and the lowest point of the resonance cavity 13 in the direction of gravity, and H is the vertical distance between the highest point and the lowest point of the resonance cavity 13 in the direction of gravity. As shown in FIG. 1, the first oil return channel 132 is located in the bottom space of the resonance cavity 13, that is, the first oil return channel 132 is spaced apart from the upper end of the resonance cavity 13 and is spaced apart from the lower end of the resonance cavity 13, and the ratio of the vertical distance between the first oil return channel 132 and the lowest point of the resonance cavity 13 to the vertical distance between the highest point and the lowest point of the resonance cavity 13 is less than 0.3, such as 0.28, 0.25 or 0.2. Figure 3 Figure 3 As shown in FIG. 1, the first oil return channel 132 is located in the bottom space of the resonance cavity 13, that is, the first oil return channel 132 is spaced apart from the upper end of the resonance cavity 13 and is spaced apart from the lower end of the resonance cavity 13, and the ratio of the vertical distance between the first oil return channel 132 and the lowest point of the resonance cavity 13 to the vertical distance between the highest point and the lowest point of the resonance cavity 13 is less than 0.3, such as 0.28, 0.25 or 0.2.

[0074] Therefore, the position of the first oil return channel 132 in the resonance cavity 13 is set within the above range, so that the position of the inlet end of the first oil return channel 132 in the resonance cavity 13 is relatively low, which ensures that the oil liquid deposited in the resonance cavity 13 can be returned from the first oil return channel 132, avoids that the oil liquid deposited in the resonance cavity 13 is too much to cause the first end cover 21 to be pressed too hard, and ensures the effectiveness of oil return.

[0075] In actual design, the first oil return channel 132 can be arranged as at least one, that is, one first oil return channel 132 can be arranged on the outer circumferential wall of the resonance cavity 13, or two, three or more first oil return channels 132 can be arranged to ensure the amount of oil return and prevent a single first oil return channel 132 from being blocked to cause normal oil return to be unable to be achieved, thereby improving the reliability of oil return.

[0076] ​In the present application, the height of the first oil return channel 132 can be flexibly set according to the position of the oil separation outlet 152. For example, when the oil separation outlet 152 is located on the inner circumferential wall of the connecting channel 14, the height of the oil separation outlet 152 is relatively high, and less oil enters the resonance cavity 13, so the height of the first oil return channel 132 is relatively high; or when the oil separation outlet 152 is located on the inner circumferential wall of the resonance cavity 13, the height of the oil separation outlet 152 is relatively low, and more oil enters the resonance cavity 13, so the height of the first oil return channel 132 is relatively low, to ensure timely oil return. Wherein, the relatively high and the relatively low are compared between the two setting modes, and are not absolutely high or low.

[0077] In some embodiments, the bottom wall of the refrigerant discharge channel 12 is provided with an oil separation outlet 152 and a first inlet hole 141, as shown in the figure, the oil separation outlet 152 and the first inlet hole 141 are distributed on the bottom wall of the refrigerant discharge channel 12 with a certain interval, that is, the oil separation outlet 152 and the first inlet hole 141 are respectively formed without interference. Figures 2-5

[0078] Wherein, the oil separation outlet 152 is in communication with the oil separation cavity 15, and the first inlet hole 141 is in communication with the resonance cavity 13, so that when the electric compressor 100 is running, the gaseous refrigerant separated in the oil separation cavity 15 can enter the refrigerant discharge channel 12 upward from the oil separation outlet 152, and diffuse in the refrigerant discharge channel 12, such as upward or along the radial direction of the refrigerant discharge channel 12. Thus, the vibration noise and pressure pulsation in the gaseous refrigerant can enter the resonance cavity 13 in the process of diffusion of the gaseous refrigerant, that is, first through the connecting channel 14 into the sound attenuation insert pipe 4, and then diffuse from the port of the sound attenuation insert pipe 4 or the sound attenuation hole of the sound attenuation insert pipe 4 to the whole resonance cavity 13, to realize sound attenuation treatment.

[0079] And in actual processing, the oil separation outlet 152 and the oil separation cavity 15 can be co-formed, that is, the oil separation outlet 152 is formed at the upper end of the oil separation cavity 15, and the axis of the oil separation cavity 15 coincides with the axis of the oil separation outlet 152, such as when the oil separation cavity 15 is processed by a punching tool, the oil separation cavity 15 can be processed first, and after the oil separation cavity 15 is punched, the oil separation outlet 152 is processed by continuously reducing the punching radius, so that the co-formation of the oil separation outlet 152 and the oil separation cavity 15 can be realized, and the processing cost is reduced. Similarly, the first inlet hole 141 can also be co-formed with the resonance cavity 13, the connecting channel 14 is located at the upper end of the resonance cavity 13, and the end of the connecting channel 14 away from the resonance cavity 13 is open and forms the first inlet hole 141, so that when the resonance cavity 13 is processed in the form of punching, the resonance cavity 13 can be processed first, and after the resonance cavity 13 is punched, the connecting channel 14 is processed by continuously reducing the punching radius, so that the connecting channel 14 is connected with the refrigerant discharge channel 12 to form the first inlet hole 141, so that the co-formation of the first inlet hole 141 and the resonance cavity 13 can be realized, and the processing cost is reduced.​

[0080] It should be noted that the aperture of the first inlet hole 141 and the aperture of the oil separation outlet 152 in the present application can be set to be the same or approximately the same, that is, the aperture difference between the two is small, thereby facilitating processing by the same punching tool, reducing processing cost, and reducing processing difficulty.

[0081] In some embodiments, the first inlet hole 141 and the oil separation outlet 152 are located on both sides of the central axis of the refrigerant discharge channel 12, as shown in Figure 2 Figure 5 As shown in the middle, the central axis of the refrigerant discharge channel 12 extends vertically, and the first inlet hole 141 is located on the left side of the central axis of the refrigerant discharge channel 12, and the oil separation outlet 152 is located on the right side of the central axis of the refrigerant discharge channel 12, and the first inlet hole 141 and the oil separation outlet 152 are spaced apart.

[0082] In this way, the functions of the first inlet hole 141 and the oil separation outlet 152 can be spaced apart from each other, that is, the gaseous refrigerant flowing out of the oil separation outlet 152 will not interfere with the airflow at the first inlet hole 141, ensuring that the flow of gaseous refrigerant and the sound attenuation effect of the resonance cavity 13 do not interfere with each other.

[0083] In some embodiments, as shown in Figures 2-5 The surface of the high-pressure shell 1 is formed with a first opening 131 for processing the resonance cavity 13, for example, when the high-pressure shell 1 is punched and formed, the punching tool can be inserted from the first opening 131 for punching operation, and the punching tool can be withdrawn from the first opening 131, or when the high-pressure shell 1 is cast and formed, the processing mold of the resonance cavity 13 can be withdrawn from the first opening 131. Thus, by designing the first opening 131, it is beneficial to realize the processing and forming of the resonance cavity 13, facilitate the realization of various processing methods of the high-pressure shell 1, reduce the processing difficulty and processing cost of the high-pressure shell 1, and facilitate the mass production and practical application of the high-pressure shell 1.

[0084] And as shown in Figures 2-5 The high-pressure shell 1 includes a first end cover 21 covering the first opening 131, that is, in the present application, the first opening 131 is designed in cooperation with the first end cover 21, after the high-pressure shell 1 is installed in the entire electric compressor 100, the resonance cavity 13 and the refrigerant discharge channel 12 are communicated through the connecting channel 14, and the resonance cavity 13 is closed at the first opening 131 through the first end cover 21, thereby forming a cavity structure that satisfies the Helmholtz resonance principle.

[0085] In the specific design, the resonant cavity 13 can be configured as a hole shape, and the first opening 131 is formed at at least one side hole end of the resonant cavity 13 (it can be understood that the hole shape has two side end holes, and one side end hole of the resonant cavity 13 is communicated with the refrigerant discharge channel 12, and the other side end hole is formed with the first opening 131); wherein, the resonant cavity 13 is a hole shape, which means that it has a certain depth of three-dimensional hole shape, rather than a planar hole shape, and the two ends in the center line extension direction of the hole are the two ends of the resonant cavity 13 in the length direction. Therefore, the resonant cavity 13 in the application has a simple structure, is easy to process, can be processed by punching or casting, has a flexible setting position, meets the design requirements of different models, occupies a smaller space, reduces the overall volume under the premise of meeting the noise reduction, and saves the occupation of the space in the vehicle.

[0086] In some embodiments, as shown in Figures 2-5 The high-pressure shell 1 includes a second end cover 22 arranged on the second opening 154, that is, in the application, the second opening 154 is designed in cooperation with the second end cover 22, and after the high-pressure shell 1 is installed on the entire electric compressor 100, the high-pressure cavity 11 is communicated with the oil separation inlet 151 of the oil separation cavity 15, and the resonant cavity 13 is communicated with the oil separation inlet 151 of the oil separation cavity 15, and the second opening 154 is closed by the second end cover 22, so that the oil separation cavity 15 has a stable sealing state at positions other than the oil separation inlet 151 and the oil separation inlet 151, thereby ensuring the reliability of the oil separation effect.

[0087] The center line of the oil separation outlet 152 coincides with the center line of the oil separation cavity 15, and the oil separation outlet 152 and the oil separation cavity 15 are both adapted to be processed and formed through the second opening 154. It should be noted that the oil separation cavity 15 is configured as a channel structure with a circular cross section, the oil separation outlet 152 is also configured as a channel structure with a circular cross section, and the center line of the oil separation cavity 15 and the center line of the oil separation outlet 152 are respective axes, that is, the axis of the oil separation cavity 15 coincides with the axis of the oil separation outlet 152. As shown in Figures 2-4 The second opening 154 is arranged at the lower right end of the oil separation cavity 15, and the oil separation outlet 152 is formed at the upper left end of the oil separation cavity 15, so that the oil separation cavity 15 and the oil separation outlet 152 can be jointly formed when being jointly processed and formed.

[0088] Specifically, when the high-pressure shell 1 is punched and formed, the punching tool can be extended into the second opening 154 to perform the punching operation, and the punching tool first processes the oil separation cavity 15 on the high-pressure shell 1, and along with the extension of the punching tool and the reduction of the punching radius, the oil separation outlet 152 can be processed, and the axis of the oil separation outlet 152 coincides with the axis of the oil separation cavity 15, so that the punching tool can operate in a single processing direction or a tool withdrawal direction, reducing the forming difficulty. Alternatively, when the high-pressure shell 1 is cast formed, the processing mold of the oil separation cavity 15 can be withdrawn from the second opening 154, and in actual design, the oil separation cavity 15 and the oil separation outlet 152 are processed and formed by the same mold, such as the processing mold including two parts, one part with a smaller diameter for forming the oil separation outlet 152, and the other part with a larger diameter for forming the oil separation cavity 15, and the second opening 154 is larger than the outer diameter of the processing mold, which is beneficial to realize rapid demolding, so that the oil separation cavity 15 and the oil separation outlet 152 can be demolded and formed by the same mold, improving the processing efficiency, and reducing the number of molds and the processing cost.

[0089] In actual processing, the punching tool can be withdrawn along the axis of the oil separation cavity 15, or the processing mold can be withdrawn along the axis of the oil separation cavity 15, to avoid damage to the formed high-pressure shell 1 by the punching tool or the processing mold.

[0090] In actual design, the first opening 131 is located at the bottom of the resonance cavity 13 in the direction of gravity, and the second opening 154 is located at the bottom of the oil separation cavity 15 in the direction of gravity, as shown in Figures 2-5 The first opening 131 is formed at the lower left end of the resonance cavity 13, and the second opening 154 is formed at the lower right end of the oil separation cavity 15, thereby improving the processing efficiency and the processing yield. As the resonance cavity 13 and the oil separation cavity 15 are both punched and formed, the punching tool can be extended into the resonance cavity 13 from the lower end of the resonance cavity 13, and the punching tool can be extended into the oil separation cavity 15 from the lower end of the oil separation cavity 15. The debris generated during the punching process can be automatically withdrawn from the lower end of the corresponding cavity, without affecting further punching, and the tool withdrawal process can be assisted by gravity to improve the tool withdrawal efficiency. Similarly, in the case of cast forming, the demolding efficiency is also improved.

[0091] In some embodiments, a first processing end face is formed on the outside of the high-pressure shell 1, and the first opening 131 is open at the first processing end face, as shown in Figures 2-5As shown, the first machining end face is configured as a machining plane arranged on the outer side of the high-pressure shell 1, and the surface is regular and smooth, which is not easy to interfere with the punching tool or die, and is beneficial to realize the user to operate the punching tool or die to be taken out. The first end cover 21 comprises a pressing portion 211 and a connecting portion 212, and the pressing portion 211 and the connecting portion 212 are integrally formed. The pressing portion 211 is configured as a disc, the connecting portion 212 is configured as a column, the end face of the pressing portion 211 is fixedly connected with the end face of the connecting portion 212, and the outer diameter of the pressing portion 211 is larger than the outer diameter of the connecting portion 212 to form a limiting surface at the position connected with the connecting portion 212. When assembled, the connecting portion 212 can be stretched into the first opening 131, and the connecting portion 212 is fixedly connected with the inner peripheral wall of the first opening 131, while the pressing portion 211 is located outside the first opening 131 and is pressed against the first machining end face.

[0092] In specific design, the connecting portion 212 can be threadedly connected with the inner peripheral wall of the first opening 131, so that the connecting portion 212 can be taken out or assembled from the first opening 131 in a rotating manner, or the connecting portion 212 can be interference-fitted with the inner peripheral wall of the first opening 131, that is, the connecting portion 212 can be pressed into the first opening 131 to be tightly extruded with the inner peripheral wall of the first opening 131, so as to ensure the connection stability of the first end cover 21 at the first opening 131. The limiting surface of the pressing portion 211 is designed to be pressed against the first machining end face, which can limit the relative position between the first end cover 21 and the high-pressure shell 1, that is, when the connecting portion 212 is fitted to the maximum position in the first opening 131, the pressing portion 211 is pressed against the first machining end face, preventing the first end cover 21 from being excessively or even completely stretched into the first opening 131, so that part of the pressing portion 211 of the first end cover 21 is effectively kept outside the first opening 131, ensuring the relative position between the first end cover 21 and the high-pressure shell 1, and facilitating the user to operate the pressing portion 211 to assemble and disassemble the first end cover 21, improving the rationality of the structure design.

[0093] In addition, the outer side of the high-pressure shell 1 is formed with a second machining end face, and the second opening 154 is open in the second machining end face, as shown in Figures 2-5 As shown, the second machining end face is configured as a machining plane arranged on the outer side of the high-pressure shell 1, and the surface is regular and smooth, which is not easy to interfere with the punching tool or die, and is beneficial to realize the user to operate the punching tool or die to be taken out. The second end cover 22 can be configured in the same structure as the first end cover 21, and the fitting mode of the second end cover 22 and the first end cover 21 is the same, which will not be described here.

[0094] In some embodiments, the center axis of the resonance cavity 13 and the center axis of the oil separation cavity 15 have an included angle, as shown in Figures 2-5As shown, the extending direction of the central axis of the resonance cavity 13 is from the lower left to the upper right, and the extending direction of the central axis of the oil separation cavity 15 is from the lower right to the upper left, and the two are oppositely inclined.

[0095] Therefore, the resonance cavity 13 and the oil separation cavity 15 can be respectively processed and formed from different directions and different angles, so that the resonance cavity 13 and the oil separation cavity 15 can be simultaneously processed and formed. For example, when the resonance cavity 13 and the oil separation cavity 15 are both punched and formed, one punching tool can be inserted into the resonance cavity 13 along the central axis thereof, and another punching tool can be inserted into the oil separation cavity 15 along the central axis thereof, and the two punching tools can operate and process simultaneously.

[0096] In some embodiments, the oil separation cavity 15 is provided with an oil separation member 3 for oil-gas separation. The oil separation member 3 is used to improve the oil separation effect in the oil separation cavity 15. The refrigerant in the oil separation cavity 15 can be separated by the oil separation member 3 and then discharged from the oil separation outlet 152. That is, after the high-pressure refrigerant in the high-pressure cavity 11 enters the oil separation cavity 15, the separated oil is deposited at the bottom space of the oil separation cavity 15 under the separation action of the oil separation member 3, and flows back to the space where the compression component 20 is located through the second oil return channel 153 in the oil separation cavity 15. The separated gaseous refrigerant is discharged upward at the oil separation outlet 152.

[0097] Further, the oil separation member 3 is configured as a hollow tubular structure, such as an oil separation plug. The axial direction of the oil separation member 3 is parallel to the length direction of the oil separation cavity 15, that is, the axis of the lumen of the oil separation plug is parallel to the axis of the oil separation cavity 15. The oil separation inlet 151 is located outside the peripheral wall of the oil separation member 3, that is, the oil separation inlet 151 is arranged on the outer peripheral wall of the oil separation cavity 15 and located radially outside the oil separation plug.

[0098] It should be noted that, as shown in Figures 2-5 after the oil separation plug is installed in the oil separation cavity 15, the oil separation plug is located in the upper space of the oil separation cavity 15, the upper end of the oil separation plug is fixedly connected with the upper end of the oil separation cavity 15, the lower end of the oil separation plug is suspended in the oil separation cavity 15, and both ends of the oil separation plug are open. The upper end of the oil separation plug communicates with the oil separation outlet 152, and the lower end of the oil separation plug communicates with the oil separation cavity 15. As shown in Figures 2-5 the height of the oil separation inlet 151 is located between the upper end and the lower end of the oil separation plug.

[0099] In this way, after the high-pressure refrigerant in the high-pressure chamber 11 enters the oil separator chamber 15, the high-pressure refrigerant acts on the outer peripheral wall of the oil separator tube at a high flow rate. Guided by the outer peripheral wall of the oil separator tube and its own gravity, it moves downward and moves to the space below the lower end of the oil separator tube. Then, under the action of the internal pressure of the oil separator chamber 15, the separated gaseous refrigerant enters the lumen of the oil separator tube and is discharged upward from the oil separator outlet 152. Meanwhile, the oil separated from the high-pressure refrigerant is deposited downward along the outer peripheral wall of the oil separator tube or the inner peripheral wall of the oil separator chamber 15 into the bottom space of the oil separator chamber 15, and then flows back from the second oil return channel 153 to the space where the compression component 20 is located, thus realizing oil-gas separation.

[0100] It can be understood that the oil separator inlet 151 and the outer peripheral wall of the oil separator tube are arranged radially opposite each other, so that the high-pressure refrigerant entering the oil separator chamber 15 from the oil separator inlet 151 directly acts on the outer peripheral wall of the oil separator tube, and flows towards the inner peripheral wall of the oil separator chamber 15 under the guidance of the oil separator tube, forming a circumferential swirling flow along the inner peripheral wall of the oil separator chamber 15. This accelerates the separation of oil and gas during the circumferential swirling flow, which helps to enhance the oil and gas separation effect.

[0101] In actual design, such as Figures 2-5 As shown, the axial length of the oil separator tube is set to be no less than half the axial length of the oil separator chamber 15. This ensures that the high-pressure refrigerant has sufficient flow path to achieve oil-gas separation after entering the oil separator chamber 15, thereby reducing the amount of oil accompanying the gaseous refrigerant, which in turn reduces the amount of oil entering the resonant chamber 13 or the connecting channel 14.

[0102] Below, please refer to the appendix. Figure 1 The electric compressor 100 according to a second aspect embodiment of the present invention is described.

[0103] like Figure 1 As shown, the electric compressor 100 may include a housing component, a compression component 20, and a motor component 30. The housing component includes a high-pressure housing assembly for the electric compressor according to any embodiment of the first aspect described above. The exhaust port 201 of the compression component 20 communicates with the high-pressure chamber 11 to discharge compressed refrigerant into the high-pressure chamber 11. The motor component 30 includes a motor body 301 and a drive shaft 302. The motor body 301 drives the compression component 20 to perform compression work through the drive shaft 302. Thus, by providing the high-pressure housing 1, the exhaust airflow noise and pressure pulsation generated during the operation of the electric compressor 100 can be effectively improved.

[0104] It should be noted that the specific type of electric compressor 100 is not limited. For example, it can be a horizontal compressor with its central axis extending laterally or slightly inclined to the horizontal line, or a vertical compressor with its central axis extending vertically or slightly inclined to the vertical line, etc.

[0105] It is worth mentioning that the specific type of the electric compressor 100 is not limited, for example, it can be a rotary compressor or a scroll compressor, etc. When the electric compressor 100 is a rotary compressor (not shown in the example), the compression component 20 can include a cylinder, a piston, a sliding vane, etc., and the drive shaft 302 drives the piston to roll in the cylinder. When the electric compressor 100 is a scroll compressor (for example Figure 1 shown in the example), the compression component 20 can include a static scroll, a dynamic scroll, and the drive shaft 302 drives the dynamic scroll to rotate, etc.

[0106] It is worth mentioning that the relative position relationship between the high-pressure shell 1 and the compression component 20 is not limited, for example, the compression component 20 can be completely located outside the high-pressure shell 1, or the compression component 20 can also be at least partially located outside the high-pressure shell 1, etc., so as to meet the different design requirements of different models.

[0107] In some embodiments, as Figure 1 shown, the shell component further includes a middle partition plate 103 and a low-pressure shell 102, the compression component 20 and the motor body 301 are located on two sides of the middle partition plate 103, and the drive shaft 302 penetrates the middle partition plate 103 to be connected with the compression component 20; the low-pressure shell 102 and the middle partition plate 103 form a low-pressure cavity 105 accommodating the motor body 301, and the low-pressure shell 102 is formed with a refrigerant suction port 1021 communicating with the low-pressure cavity 105, and the compression component 20 sucks in the refrigerant from the low-pressure cavity 105. Wherein, the cover plate 104 is further connected on the low-pressure shell 102, and the cover plate 104 and the low-pressure shell 102 define a mounting space, and the electric control component 40 is arranged in the mounting space.

[0108] Therefore, the electric compressor 100 can be a low-back-pressure compressor, which is beneficial to the application of new energy vehicles 1000 such as pure electric vehicles and hybrid vehicles, and when used in these vehicles 1000, it can improve the exhaust gas flow noise and pressure pulsation of the electric compressor 100, improve the resonance problem of the vehicle thermal management system, and improve the noise and vibration caused to the vehicle 1000.

[0109] In some embodiments, as Figure 1 shown, the middle partition plate 103 is clamped between the low-pressure shell 102 and the compression component 20, and the high-pressure shell 1 is arranged on the side of the compression component 20 away from the middle partition plate 103. Therefore, the structure can be simplified, the assembly can be simplified, the volume can be reduced, the production efficiency can be improved, and the connection reliability can be improved. For example, such a structure can be applied to a scroll compressor, but the structure of the scroll compressor is not limited thereto.

[0110] Further, as Figure 1As shown, the high-pressure housing 1 has a housing end face, on which a high-pressure cavity 11 is formed. The high-pressure cavity 11 is open to the compression component 20. The compression component 20 is sealed to the housing end face. The exhaust port 201 of the compression component 20 is open to the high-pressure cavity 11, thereby enabling communication between the exhaust port 201 and the high-pressure cavity 11.

[0111] Hereinafter, with reference to the accompanying drawings, an air conditioning system 300 according to a third aspect embodiment of the present invention will be described.

[0112] The air conditioning system 300 may include an electric compressor 100 according to any embodiment of the second aspect of the present invention. Since the exhaust noise and pulsation of the electric compressor 100 according to any embodiment of the second aspect of the present invention can be improved, when the electric compressor 100 is used in the air conditioning system 300, the pressure pulsation and noise problems caused to the air conditioning system 300 due to the exhaust airflow noise and pressure pulsation of the electric compressor 100 can be improved.

[0113] It should be noted that the specific application scenarios of the air conditioning system 300 according to the embodiments of the present invention are not limited, such as indoor air conditioning, indoor refrigerator, vehicle air conditioning, etc. Once the application scenario is determined, those skilled in the art can know other components of the air conditioning system 300. For example, when used for indoor air conditioning or indoor refrigerator, it may also include an evaporator, a condenser, a throttling element, etc. For example, when used for vehicle air conditioning, it may also include at least one of an in-vehicle condenser, an in-vehicle evaporator, an external condenser, an external evaporator, a throttling component, etc., which will not be elaborated here.

[0114] Hereinafter, a vehicle 1000 according to a fourth aspect embodiment of the present invention will be described with reference to the accompanying drawings.

[0115] like Figure 6 As shown, vehicle 1000 may include vehicle body 200 and air conditioning system 300 mounted on vehicle body 200. Air conditioning system 300 includes an air conditioning system 300 according to any embodiment of the third aspect of the present invention. Since the exhaust noise and pulsation of the electric compressor 100 included in the air conditioning system 300 according to any embodiment of the third aspect of the present invention can be improved, when the air conditioning system 300 is used in vehicle 1000, the resonance problem of various components in the thermal management system of vehicle 1000 caused by the exhaust airflow noise and pressure pulsation of electric compressor 100 can be improved, thereby reducing the noise and vibration caused to vehicle 1000. Optionally, electric compressor 100 is used to compress at least one refrigerant selected from R134a, R744, R290 and R1234yf, thereby meeting the requirements for vehicle use.

[0116] It should be noted that the specific type of vehicle 1000 according to the embodiments of the present invention is not limited. For example, it can be a new energy vehicle, which may include pure electric vehicles, hybrid vehicles, etc., which will not be elaborated here. In addition, once the type of vehicle 1000 is specifically determined, those skilled in the art will know the other components of vehicle 1000, which will not be elaborated here.

[0117] Below, in conjunction with the appendix Figures 2-5 The high-pressure housing assembly of an electric compressor for a vehicle 1000 is described in some specific embodiments of the present invention.

[0118] Example 1

[0119] like Figure 2 As shown, a high-pressure chamber 11 and a refrigerant discharge channel 12 are formed on the high-pressure housing 1. The high-pressure chamber 11 is located in the lower region of the high-pressure housing 1, and the refrigerant discharge channel 12 is located in the upper region of the high-pressure housing 1. A resonant chamber 13 and an oil separator 15 are also formed on the high-pressure housing 1. The high-pressure chamber 11 is located between the resonant chamber 13 and the oil separator 15. The resonant cavity 13 is formed on the left side of the high-pressure housing 1, and extends obliquely from the lower left to the upper right along the high-pressure housing 1. At the same time, the oil separator 15 is formed on the right side of the high-pressure housing 1, and extends obliquely from the lower right to the upper left along the high-pressure housing 1. The outer peripheral wall of the oil separator 15 is provided with an oil separator inlet 151, which connects the high-pressure cavity 11 and the oil separator 15. An oil separator outlet 152 is provided at the upper end of the oil separator 15, which is formed on the inner bottom wall of the refrigerant discharge channel 12, so that the oil separator 15 is connected to the refrigerant discharge channel 12 through the oil separator outlet 152. An oil separator component 3 is provided inside the oil separator 15. The upper end of the resonant cavity 13 is provided with a connecting channel 14, which connects the resonant cavity 13 and the refrigerant discharge channel 12. A first inlet hole 141 is formed at the upper end of the resonant cavity 13, which is formed on the inner bottom wall of the refrigerant discharge channel 12.

[0120] Among them, such as Figure 2 As shown, the lower end of the resonant cavity 13 is open, forming a first opening 131. The first opening 131 is located at the lower left of the high-pressure housing 1 and is used for machining the resonant cavity 13. A first end cap 21 is provided at the first opening 131 to close the lower end of the resonant cavity 13. The first end cap 21 includes a pressing part 211 and a connecting part 212. The pressing part 211 forms a limiting surface at the position where it connects with the connecting part 212. The connecting part 212 is press-fitted with the inner peripheral wall of the first opening 131, and the limiting surface of the pressing part 211 is press-fitted with the first machined end face.

[0121] A second oil return channel 153 is provided in the oil separator chamber 15, which connects the oil separator chamber 15 with the space where the compression component 20 is located, so that the oil deposited in the second oil return channel 153 can return to the space where the compression component 20 is located. At the same time, the lower end of the oil separator chamber 15 is open, forming a second opening 154. The second opening 154 is located at the lower right of the high-pressure housing 1 and is used to process the oil separator chamber 15. A second end cap 22 is provided at the second opening 154 to close the lower end of the oil separator chamber 15. The second end cap 22 has the same structure as the first end cap 21.

[0122] Example 2

[0123] like Figure 3 As shown, the difference between this embodiment 2 and the above embodiment 1 is that a first oil return channel 132 is provided in the resonant cavity 13. The first oil return channel 132 is used to return the oil in the resonant cavity 13 to the space where the compression component 20 is located, so as to realize recycling.

[0124] Example 3

[0125] like Figure 4 As shown, the difference between this embodiment 3 and the above embodiment 1 includes: a silencing tube 4 is provided inside the high-pressure housing 1, one end of the silencing tube 4 is connected to the inner wall of the connecting channel 14, and the other end of the silencing tube 4 extends into the resonant cavity 13 and is open into the resonant cavity 13.

[0126] Example 4

[0127] like Figure 5 As shown, the difference between this fourth embodiment and the first embodiment mentioned above includes: a first oil return channel 132 is provided in the resonant cavity 13, which is used to return the oil in the resonant cavity 13 to the space where the compression component 20 is located, so as to realize recycling. At the same time, a silencer tube 4 is provided in the high-pressure housing 1. One end of the silencer tube 4 is connected to the inner wall of the connecting channel 14, and the other end of the silencer tube 4 extends into the resonant cavity 13 and is open towards the resonant cavity 13.

[0128] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0129] In the description of the present application, "first feature", "second feature" can include one or more of the features.

[0130] In the description of the present application, "a plurality of" means two or more.

[0131] In the description of the present application, "on" or "under" the first feature to the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0132] In the description of the present application, "on", "above" and "over" the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0133] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0134] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A high-pressure housing assembly for an electric compressor, characterized in that, include: A high-pressure housing (1) is provided, on which a high-pressure chamber (11) and a refrigerant discharge passage (12) are formed. The compression component (20) of the electric compressor (100) is adapted to discharge compressed refrigerant into the high-pressure chamber (11), and the refrigerant discharge passage (12) is used to discharge refrigerant out of the high-pressure housing (1). The high-pressure housing (1) is also provided with spaced-apart resonant cavities (13) and oil separator cavities (15). The oil separator inlet (151) in the oil separator cavities (15) is connected to the high-pressure cavity (11). The oil separator outlet (152) in the oil separator cavities (15) is located on the inner wall of the refrigerant discharge channel (12). The resonant cavity (13) is connected to the refrigerant discharge channel (12). The high-pressure housing (1) has a first opening (131) formed on its surface for processing the resonant cavity (13), and the high-pressure housing (1) includes a first end cap (21) covering the first opening (131). The surface of the high-pressure housing (1) is formed with a second opening (154) for processing the oil separator (15), and the high-pressure housing (1) includes a second end cap (22) covering the second opening (154); The first opening (131) is located at the bottom of the resonant cavity (13) in the direction of gravity, and the second opening (154) is located at the bottom of the oil separation cavity (15) in the direction of gravity. The central axis of the resonant cavity (13) and the central axis of the oil separation cavity (15) are at an angle; The bottom wall of the refrigerant discharge channel (12) is provided with the oil outlet (152) and a first inlet (141) spaced apart from the oil outlet (152), and the first inlet (141) is connected to the resonant cavity (13); The first inlet (141) and the oil outlet (152) are located on both sides of the central axis of the refrigerant discharge channel (12).

2. The high-pressure housing assembly for an electric compressor according to claim 1, characterized in that, The resonant cavity (13) is connected to the refrigerant discharge channel (12) through a connecting channel (14), and the cross-sectional area of ​​the connecting channel (14) is smaller than the cross-sectional area of ​​the resonant cavity (13).

3. The high-pressure housing assembly for an electric compressor according to claim 2, characterized in that, The high-pressure housing (1) is also provided with a silencing tube (4), one end of which is connected to the inner wall of the connecting channel (14), and the other end of which extends into the resonant cavity (13) and is open into the resonant cavity (13).

4. The high-pressure housing assembly for an electric compressor according to claim 3, characterized in that, The length direction of the silencing cannula (4) is parallel to the length direction of the resonant cavity (13), and the length of the silencing cannula (4) extending into the resonant cavity (13) is less than 2 / 3 of the extension length of the resonant cavity (13).

5. The high-pressure housing assembly for an electric compressor according to claim 3, characterized in that, The silencing cannula (4) is provided with at least one silencing hole.

6. The high-pressure housing assembly for an electric compressor according to claim 1, characterized in that, The resonant cavity (13) is provided with a first oil return channel (132), which is located in the lower space in the direction of gravity within the resonant cavity (13). The first oil return channel (132) is used to direct the separated lubricating oil to the compression component (20).

7. The high-pressure housing assembly for an electric compressor according to claim 6, characterized in that, The first oil return channel (132) is positioned in the resonant cavity (13) such that h ≤ 0.3H; where h is the vertical distance between the highest point of the first oil return channel (132) and the lowest point of the resonant cavity (13) in the direction of gravity, and H is the vertical distance between the highest point and the lowest point of the resonant cavity (13) in the direction of gravity.

8. The high-pressure housing assembly for an electric compressor according to claim 1, characterized in that, The outer side of the high-pressure housing (1) has a first machined end face, and the first opening (131) is formed open on the first machined end face. The first end cover (21) includes a pressing part (211) and a connecting part (212). The outer diameter of the pressing part (211) is larger than the outer diameter of the connecting part (212) to form a limiting surface at the position where it is connected to the connecting part (212). The connecting part (212) extends into the first opening (131) and is connected and fixed to the inner peripheral wall of the first opening (131). The pressing part (211) is located outside the first opening (131) and the limiting surface presses against the first processing end face.

9. The high-pressure housing assembly for an electric compressor according to any one of claims 1-8, characterized in that, The oil separator chamber (15) is provided with an oil separator component (3) for oil-gas separation. The refrigerant entering the oil separator chamber (15) is discharged from the oil separator outlet (152) after being separated by the oil separator component (3).

10. The high-pressure housing assembly for an electric compressor according to claim 9, characterized in that, The oil separator (3) is constructed as a hollow tubular structure. The axial direction of the oil separator (3) is parallel to the length direction of the oil separator cavity (15). The oil inlet (151) is located on the outer side of the peripheral wall of the oil separator (3).

11. An electric compressor (100), characterized in that, include: A housing component, the housing component comprising a high-pressure housing assembly for an electric compressor according to any one of claims 1-10; A compression component (20) has an exhaust port (201) connected to the high-pressure chamber (11) to discharge compressed refrigerant into the high-pressure chamber (11); The motor component (30) includes a motor body (301) and a drive shaft (302). The motor body (301) drives the compression component (20) to perform compression work through the drive shaft (302).

12. The electric compressor (100) according to claim 11, characterized in that, The housing component also includes: A partition plate (103) is provided, the compression component (20) and the motor body (301) are respectively placed on both sides of the partition plate (103), and the drive shaft (302) passes through the partition plate (103) to connect with the compression component (20); A low-pressure housing (102) is formed between the low-pressure housing (102) and the middle partition (103) to form a low-pressure cavity (105) for accommodating the motor body (301). A refrigerant inlet (1021) communicating with the low-pressure cavity (105) is formed on the low-pressure housing (102). The compression component (20) draws in refrigerant from the low-pressure cavity (105).

13. An air conditioning system (300), characterized in that, Includes the electric compressor (100) according to any one of claims 11-12.

14. A vehicle (1000), characterized in that, Includes the air conditioning system (300) as described in claim 13.

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